15449979 has 16 divisors (see below), whose sum is σ = 21301280. Its totient is φ = 9953280.

The previous prime is 15449947. The next prime is 15450013. The reversal of 15449979 is 97994451.

It is not a de Polignac number, because 15449979 - 2⁵ = 15449947 is a prime.

It is a super-2 number, since 2×15449979² = 477403702200882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15449909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19707 + ... + 20475.

It is an arithmetic number, because the mean of its divisors is an integer number (1331330).

Almost surely, 2^15449979 is an apocalyptic number.

15449979 is a deficient number, since it is larger than the sum of its proper divisors (5851301).

15449979 is a wasteful number, since it uses less digits than its factorization.

15449979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its digits is 408240, while the sum is 48.

The square root of 15449979 is about 3930.6461300911. The cubic root of 15449979 is about 249.0630475338.

The spelling of 15449979 in words is "fifteen million, four hundred forty-nine thousand, nine hundred seventy-nine".